# Adaptive Biotechnologies Cor (ADPT): who owns it

1 value investor held Adaptive Biotechnologies Cor in their Q3 2026 13F, led by Polen Capital Management.

## 13F holders

| Manager | Portfolio | Value | Change | Quarters held |
| --- | --- | --- | --- | --- |
| Polen Capital Management | 0.0% | $2.2m | Trimmed -12% | 5 |

## Directors buying and selling (Form 4, last 12 months)

| Date | Who | Role | Bought or sold | Shares | Value |
| --- | --- | --- | --- | --- | --- |
| 2026-10-16 | RUBINSTEIN JULIE | President and COO | Sold | 11581 | $280k |
| 2026-10-16 | RUBINSTEIN JULIE | President and COO | Sold | 300 | $8k |
| 2026-10-15 | RUBINSTEIN JULIE | President and COO | Sold | 11881 | $304k |
| 2026-10-14 | RUBINSTEIN JULIE | President and COO | Sold | 6781 | $173k |
| 2026-10-14 | RUBINSTEIN JULIE | President and COO | Sold | 5100 | $132k |
| 2026-10-13 | RUBINSTEIN JULIE | President and COO | Sold | 11881 | $303k |
| 2026-10-12 | RUBINSTEIN JULIE | President and COO | Sold | 9181 | $233k |
| 2026-10-12 | RUBINSTEIN JULIE | President and COO | Sold | 2700 | $70k |
| 2026-10-09 | RUBINSTEIN JULIE | President and COO | Sold | 11881 | $314k |
| 2026-10-08 | RUBINSTEIN JULIE | President and COO | Sold | 11881 | $305k |
| 2026-10-07 | RUBINSTEIN JULIE | President and COO | Sold | 11881 | $314k |
| 2026-10-06 | RUBINSTEIN JULIE | President and COO | Sold | 9381 | $257k |
| 2026-10-06 | BOBULSKY SUSAN | Chief Commercial Officer, MRD | Sold | 6444 | $193k |
| 2026-10-06 | RUBINSTEIN JULIE | President and COO | Sold | 1100 | $31k |
| 2026-10-06 | RUBINSTEIN JULIE | President and COO | Sold | 901 | $27k |
| 2026-10-06 | RUBINSTEIN JULIE | President and COO | Sold | 499 | $15k |
| 2026-10-05 | RUBINSTEIN JULIE | President and COO | Sold | 6699 | $193k |
| 2026-10-05 | RUBINSTEIN JULIE | President and COO | Sold | 5182 | $154k |
| 2026-10-02 | RUBINSTEIN JULIE | President and COO | Sold | 11881 | $334k |
| 2026-10-01 | LO FRANCIS | Chief People Officer | Sold | 18698 | $535k |

Source: SEC filings, via moatshark (https://www.moatshark.com/s/adpt). Values traded and returns are estimates. Not investment advice. Built 2026-10-21.